Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September is marked by a subtle drop in average high-temperatures, transitioning from an agreeable 20.8°C (69.4°F) in August to an enjoyable 16.5°C (61.7°F). Riveo records an average low-temperature of 7.2°C (45°F) throughout the month of September.Humidity
In Riveo, the average relative humidity in September is 79%.Rainfall
In Riveo, in September, during 17.6 rainfall days, 63mm (2.48") of precipitation is typically accumulated. In Riveo, during the entire year, the rain falls for 200.8 days and collects up to 1253mm (49.33") of precipitation.Snowfall
June through September are months without snowfall in Riveo.Daylight
In Riveo, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:46 and sunset at 20:04. On the last day of September, sunrise is at 07:23 and sunset at 19:07 CEST.
Sunshine
In Riveo, Switzerland, the average sunshine in September is 9.4h.UV index
In Riveo, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Riveo in September?
What is the average humidity in September in Riveo?
How many days does it rain in September in Riveo?
When it does not snow in Riveo?
Does it snow in Riveo in September?
What is the average length of the day in September in Riveo?
What time are sunrise and sunset in September in Riveo?
How many hours of sunshine does Riveo have in September?
What is the UV index intensity in September in Riveo?
Average temperature in September
Riveo, Switzerland
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (0.9°C).
- Average low temperature in September: 7.2°C
The month with the highest average low temperature is August (10.6°C).
The coldest month (with the lowest average low temperature) is January (-5.9°C).
Average pressure in September
Riveo, Switzerland
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1015.1mbar).
Average wind speed in September
Riveo, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is February (7.4km/h).
The calmest month (with the lowest average wind speed) is November (5.8km/h).
Average humidity in September
Riveo, Switzerland
- Average humidity in September: 79%
The month with the highest relative humidity is November (83%).
The month with the lowest relative humidity is July (76%).
Average rainfall in September
Riveo, Switzerland
- Average rainfall in September: 63mm
The wettest month (with the highest rainfall) is November (164mm).
The driest month (with the least rainfall) is January (45mm).
Average rainfall days in September
Riveo, Switzerland
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is July (25.5 days).
The months with the least rainy days are February and December (8.6 days).
Average snowfall in September
Riveo, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is November (334mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Riveo, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riveo, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 24min).
Average sunshine days in September
Riveo, Switzerland
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is October (14.9 days).
The month with the least sunshine days is June (3.1 days).
Average UV index in September
Riveo, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Riveo, Switzerland
- Average cloud cover in September: 33
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Riveo, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August and December (9km).
The months with the lowest visibility are January, February, March, September, October and November (8km).
